ReactOS Executive

The Executive is all the code that runs in kernel mode. The executive can roughly be broken up into the following components: Hardware Abstraction Layer (HAL), Device Drivers, the Kernel, System Services (including the Win32k subsystem) These components all run in kernel mode. The HAL, Kernel, System Services and Device Drivers are collectively referred to as the Executive.

The executive is a part of the ReactOS Core ([ChangeLog-0.2.8 source]).